EP0083473A1 - Sicherheits-Druckentlastungsvorrichtung für Druckbehälter - Google Patents

Sicherheits-Druckentlastungsvorrichtung für Druckbehälter Download PDF

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Publication number
EP0083473A1
EP0083473A1 EP82306393A EP82306393A EP0083473A1 EP 0083473 A1 EP0083473 A1 EP 0083473A1 EP 82306393 A EP82306393 A EP 82306393A EP 82306393 A EP82306393 A EP 82306393A EP 0083473 A1 EP0083473 A1 EP 0083473A1
Authority
EP
European Patent Office
Prior art keywords
disc
flange portion
retard
relief device
pressure relief
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82306393A
Other languages
English (en)
French (fr)
Inventor
John David Falconer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrofabrication & Engineering Co Ltd
Original Assignee
Electrofabrication & Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrofabrication & Engineering Co Ltd filed Critical Electrofabrication & Engineering Co Ltd
Publication of EP0083473A1 publication Critical patent/EP0083473A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
    • F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
    • F16K17/1606—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the reverse-buckling-type

Definitions

  • This invention relates to safety pressure relief devices for location on pressure vessels to ensure that the pressure within the vessel does not exceed a predetermined maximum permissible value, and more particularly to such devices incorporating reverse bursting discs.
  • hinge means have been provided between a part of the flange portion to be retained between the support members and the adjacent regions of the dome portion of the disc. Said regions of the dome portion of the disc then hinge about said fixed part of the flange portion on reversal of said dome portion to prevent complete release of the disc from the support members.
  • a safety pressure relief device for location on a pressure vessel, the device comprising a bursting disc assembly including a reverse bursting disc having an outer annular flange portion and a central convex-concave dome portion, a retard member having an outer annular flange portion overlying said flange portion of the bursting disc and a central portion overlying part at least of the dome portion of the bursting disc, and annular inlet and outlet support members between which the flange portions of the bursting disc and the retard member are located with the retard member to the outlet side of the bursting disc, the flange portion of each of the bursting disc and the retard member having formed therein, about a substantial proportion of their circular extent - typically of the order of 270° - an arcuate line of weakness, said lines of weakness defining radially inner and outer extents to said flange portions and, between the ends of the lines of weakness in said flange portions, substantially overlying hinge extents in each flange portion, the device further comprising a bursting disc assembly
  • the arcuate lines of weakness in the flange portions of the disc and retard member preferably comprise cuts through said flange portions, although they may comprise, for example, scores or an arcuate series of perforations in the flange portions.
  • the holder member exerts axial pressure on the radially outer extent of the flange portion of the disc and on the radially outer part only of the radially inner extent of said flange portion of the disc, while it is further preferred that the radially inner extent of the flange portion of the retard member is substantially relieved of said clamping pressure.
  • the holder member conveniently comprises inlet and outlet holder portions each provided with a planar clamping surface engaging with the inlet and outlet support members respectively, the radially inner boundary of each clamping surface being located slightly radially inwardly of the line of weakness in the flange portion of the disc whereby the bulk of the clamping pressure is exerted on the radially outer extent of said flange portion.
  • the diameter of the line of weakness in the flange portion of the retard member is slightly less than that of the line of weakness in the flange portion of the disc, although said former diameter may be the same as or slightly greater than the latter diameter.
  • arcuate extents of the lines of weakness in the flange portions of the disc and the retard member, and therefore the arcuate extents of the hinge extents of said two components, are conveniently substantially the same, but they may in certain circumstances differ.
  • the assembly preferably further includes an annular sealing gasket between the flange portion of the disc and the inlet support member and underlying the line of weakness in said flange portion.
  • the disc, the retard member and the inlet and outlet support members are secured together to comprise a unitary construction, for example by means of a plurality of spot welds through the inlet and outlet support members and the radially outer extents of the flange portions of the disc and the retard member.
  • the outlet holder portion includes a surface the radially outer extent of which comprises said planar clamping surface and the radially inner extent of which, which is co-planar with said radially outer extent, comprises a supporting shoulder for the radially inner regions of the flange portions of the retard member and the disc during normal working conditions.
  • the retard member comprises a flat disc, although other configurations are possible, preferably of the same material and thickness as the bursting disc.
  • said retard member may include a substantially central aperture therethrough to prevent any inadvertent build-up of pressure within the dome portion of the disc resulting from, for example, corrosion of said disc.
  • a safety pressure relief device including a reverse bursting disc assembly indicated generally at 2 clamped between inlet and outlet portions 4,6 of a holder member, said member itself being located between inlet and outlet pipe flanges 8,10 with sealing gaskets 12,14 positioned between the pipe flanges and the holder member.
  • the assembly 2 comprises a reverse bursting disc 16 including an outer annular flange portion indicated at 18 and a central concave-convex dome portion 20.
  • the disc is domed to the required shape and a cut is then formed at a predetermined diameter in the flange portion 18 as shown in dotted lines at 22 in Fig. 5.
  • the cut 22 extends right through and around a substantial proportion of the circular extent of the flange portion 18, typically of the order of 270°, to leave the remainder of said flange portion 18 as an uncut hinge portion 24 as will become apparent from the following description.
  • the cut 22 effectively divides said extent of the flange portion 18 into radially inner and outer parts 26,28 respectively.
  • the assembly 2 further comprises a retard member in the form of a flat disc 30 preferably of similar thickness and material as the disc 2 and having the same diameter as said disc.
  • An arcuate cut 32 is formed through the outer flange regions of said retard disc at a pre-determined diameter preferably slightly less than that of the cut 22 in the disc 2, said cut 32 also extending around a substantially corresponding proportion of the retard disc 30, again typically 270°, to leave a hinge portion 34 in the uncut region of said disc 30.
  • the retard disc 30 is located to the outlet side of the disc 2 with the cuts 22 and 32, as well as the hinge portions 24,34, circumferentially aligned.
  • the flange portion 18 of the disc 2 and the overlying flange region of the disc 30 are sandwiched between annular inlet and outlet support rings 36,38 with a foil sealing ring 40 between the inlet support ring 36 and the flange portion 18 of the disc 2 to seal the cut 22, and the components are spot welded together as at 42 radially outwardly of the cuts 22,32.
  • a metal identification tag 44 is spot welded to the outlet support ring 38 at the region of the hinge portions 24,34 to extend radially outwardly of the assembly thus ensuring that the location of the hinge portions of the discs 2 and 30 can always be determined.
  • the holder portions 4,6 are provided with planar parallel clamping surfaces 46,48 respectively between which the assembly 2 is located, the inner boundary of the surfaces 46,48 being located slightly radially inwardly of the cut 22 but slightly radially outwardly of the cut 32 whereby, on tightening the flange bolts 50 to clamp the device in position, a clamping load is applied to the part 28 of the flange portion 18 of the disc 2 and to the outer regions only of the part 26 of said flange portion 18, while the part of the retard disc 30 between the support rings 36,38 but radially inwardly of the cut 32 is substantially relieved of clamping pressure.
  • the outlet holder portion 6 includes an annular shoulder 52 the inner diameter of which is identical to that of the inlet holder portion 4, the surface of said shoulder being co-planar with the clamping surface 48 to provide support for the assembly 2 under normal working conditions.
  • An abutment shoulder 54 is integrally formed on or secured to the outlet holder portion 6 in the region of the hinge portions 24,34 to project radially inwardly of the bore through said portion 6 to provide a controlled bend of the discs 2,30 on reversal as will be detailed below.
  • the inlet portion 4 of the holder member is formed with a radial slot 56 through which the tag 44 extends, and the outlet portion 6 of the holder member is provided with a dependent pin 58 adapted to be received within said slot to locate the inlet and outlet holder portions 4,6 relative to one another.
  • the hinge portions 22,32 of the discs 2,30 are radially aligned with the shoulder 54 on the outlet holder portion 6.
  • the retard disc could comprise a continuous flat member
  • the illustrated disc is provided with a central aperture 60 therein communicating into the volume 62 between the discs 2 and 30.
  • Such an arrangement ensures that, in the event of inadvertent build up of pressure in the volume 62 due for example to undetected corrosion in the dome portion 20 of the disc 2, said pressure is relieved and the characteristics of the disc 2 are not affected.
  • the assembly 2 located in its holder member 4 is positioned between the flanges 8,10 as shown in Fig. 1 and axial clamping pressure is applied to the device by tightening of the bolts 50.
  • the nature of the assembly 2 and the construction of the holder portions 4,6 are such that the torque applied to the device, providing it is at least sufficient to locate the device in position and to effect a seal between the inlet and outlet faces of the disc 2, is not crucial to accurate operation of the device.
  • the presence of the retard disc 30 serves to prevent tearing of the dome portion 20 of the disc 2 away from the hinge extent of the flange portion of the disc as might otherwise occur, the shoulder 54 further serving to control the violent movement of the reversing disc.
  • the cuts 22,32 may be replaced by, for example, scores not extending right through the material of the associated flange portions, or by arcuate series of perforations in said flange portions, or by other equivalent lines of weakness, all such that said lines of weakness are broken on reversal of the dome portion and the inner part 26 of the flange portion 18 of the disc 2 and the part of the retard disc 30 radially inwardly of the line of weakness therein are withdrawn from between the support rings 36,38 around the extent of the lines of weakness.
  • a currently preferred application of the safety pressure relief device of the invention is in a holder member of 50mm internal diameter, the disc 2 comprising 0.25mm thick stainless steel with the diameter of the cut 22 being 63mm and its angular extent being 270°.
  • the retard disc is also of 0.25mm thick stainless steel with the cut 32 having a diameter of 59mm and an angular extent of 270°.
  • the sealing gasket 40 is 0.01mm lead foil, the assembled device having a critical pressure of 29 kg/cm 2 with a working pressure ability of up to 90% of said critical pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP82306393A 1981-12-21 1982-12-01 Sicherheits-Druckentlastungsvorrichtung für Druckbehälter Withdrawn EP0083473A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8138434 1981-12-21
GB8138434 1981-12-21

Publications (1)

Publication Number Publication Date
EP0083473A1 true EP0083473A1 (de) 1983-07-13

Family

ID=10526748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82306393A Withdrawn EP0083473A1 (de) 1981-12-21 1982-12-01 Sicherheits-Druckentlastungsvorrichtung für Druckbehälter

Country Status (1)

Country Link
EP (1) EP0083473A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550743A (en) * 1982-06-04 1985-11-05 Johnson Matthey Plc Bursting disc orientation device
EP0437019A2 (de) * 1990-01-09 1991-07-17 BS & B SAFETY SYSTEMS, INC. Eingekerbte Umkehrberstscheibe
EP0791151A1 (de) * 1994-11-08 1997-08-27 BS & B SAFETY SYSTEMS, INC. Perforierte berstscheibenvorrichtung
US6221984B1 (en) 1997-05-28 2001-04-24 Basf Aktiengesellschaft Random propylene copolymer
CN100339628C (zh) * 2003-07-20 2007-09-26 大连理工大学 一种脱落型安全泄压装置
CN104350239A (zh) * 2012-04-27 2015-02-11 三菱日立电力系统株式会社 回转机械及回转机械的大气放出机构的安装方法
KR101923169B1 (ko) * 2017-10-20 2019-02-27 에프디씨 주식회사 파열디스크 어셈블리

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716506A (en) * 1953-01-16 1955-08-30 L L Fike Metal Products Co Rupture disc assembly for high pressure vessels
DE2236373A1 (de) * 1971-07-26 1973-02-08 Black Sivalls & Bryson Inc Sicherheitsvorrichtung zur druckentlastung
US3881629A (en) * 1973-09-04 1975-05-06 Continental Disc Corp Self-aligning rupture disc
DE2828341A1 (de) * 1977-09-12 1979-03-22 Black Sivalls & Bryson Inc Ueberdrucksicherung mit einer reversions-bruchscheibe
DE2934335A1 (de) * 1978-08-25 1980-03-13 Bs & B Safety Systems Ltd Ueberdruck-sicherheitseinrichtung
US4236648A (en) * 1979-03-05 1980-12-02 Black, Sivalls & Bryson Safety pressure relief apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716506A (en) * 1953-01-16 1955-08-30 L L Fike Metal Products Co Rupture disc assembly for high pressure vessels
DE2236373A1 (de) * 1971-07-26 1973-02-08 Black Sivalls & Bryson Inc Sicherheitsvorrichtung zur druckentlastung
US3881629A (en) * 1973-09-04 1975-05-06 Continental Disc Corp Self-aligning rupture disc
DE2828341A1 (de) * 1977-09-12 1979-03-22 Black Sivalls & Bryson Inc Ueberdrucksicherung mit einer reversions-bruchscheibe
DE2934335A1 (de) * 1978-08-25 1980-03-13 Bs & B Safety Systems Ltd Ueberdruck-sicherheitseinrichtung
US4236648A (en) * 1979-03-05 1980-12-02 Black, Sivalls & Bryson Safety pressure relief apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550743A (en) * 1982-06-04 1985-11-05 Johnson Matthey Plc Bursting disc orientation device
EP0437019A2 (de) * 1990-01-09 1991-07-17 BS & B SAFETY SYSTEMS, INC. Eingekerbte Umkehrberstscheibe
EP0437019A3 (en) * 1990-01-09 1991-12-18 Bs & B Safety Systems, Inc. Scored reverse buckling rupture disk assembly
EP0791151A1 (de) * 1994-11-08 1997-08-27 BS & B SAFETY SYSTEMS, INC. Perforierte berstscheibenvorrichtung
EP0791151A4 (de) * 1994-11-08 1998-01-14 Bs & B Safety Systems Inc Perforierte berstscheibenvorrichtung
US6221984B1 (en) 1997-05-28 2001-04-24 Basf Aktiengesellschaft Random propylene copolymer
CN100339628C (zh) * 2003-07-20 2007-09-26 大连理工大学 一种脱落型安全泄压装置
CN104350239A (zh) * 2012-04-27 2015-02-11 三菱日立电力系统株式会社 回转机械及回转机械的大气放出机构的安装方法
US9291100B2 (en) 2012-04-27 2016-03-22 Mitsubishi Hitachi Power Systems, Ltd. Rotary machine and mounting method of atmosphere relief mechanism for rotary machine
CN104350239B (zh) * 2012-04-27 2016-04-20 三菱日立电力系统株式会社 回转机械及回转机械的大气放出机构的安装方法
KR101923169B1 (ko) * 2017-10-20 2019-02-27 에프디씨 주식회사 파열디스크 어셈블리

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Effective date: 19830905

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Withdrawal date: 19840529

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Inventor name: FALCONER, JOHN DAVID